This study investigated the effects of four weeks of plyometric vs. weighted plyometric training on vertical jump in strength-trained females N = 14). Two groups (N = 7) were formed. The plyometric group performed depth jumps, split squats, and double-leg hops with body weight twice a week. The weighted-plyometric group performed the same exercises with the addition of a weight equivalent to 20% of 1-RM in the first week, and 40% of 1-RM in the fourth week. Both groups performed 3 x 6 squats (85% 1-RM) one day per week after plyometric training.

Both groups improved vertical jump with no difference between them.

Implication. No-weight plyometric training is as effective as weighted-plyometric training.